[Ffmpeg-devel] [PATCH] Check whether EBX is available

[Panagiotis Issaris]

Hi M?ns,

M?ns Rullg?rd schreef:
> Panagiotis Issaris <takis.issaris at uhasselt.be> writes:
>> The attached patch adds a test to configure to see whether EBX is
>> available when compiling using the current compilation flags and
>> compiler. Together with the other patch [1] which checks whether EBP is
>> available these patches are intended to make --disable-opts work again,
>> by checking for CONFIG_EBP and CONFIG_EBX in the code sections that
>> currently fail to compile when configured with --disable-opts.
>>
>>  configure |   12 ++++++++++++
>>  1 file changed, 12 insertions(+)
>>
>> With friendly regards,
>> Takis
>>
>> [1] http://article.gmane.org/gmane.comp.video.ffmpeg.devel/46433
>> diff --git a/configure b/configure
>> index 87301bc..af5cfad 100755
>> --- a/configure
>> +++ b/configure
>> @@ -1402,6 +1402,14 @@ int main(){
>>  }
>>  EOF
>>  
>> +# check wether EBX is available
>> +ebx_available=no
>> +check_cc <<EOF && ebx_available=yes
>> +int main(){
>> +    asm volatile ("":::"%ebx");
>> +}
>> +EOF
> 
> Should use "enable ebx_available" and be conditional on x86.
Done.

>>  # check for assembler specific support
>>  
>>  if test $arch = "powerpc"; then
>> @@ -1976,6 +1984,10 @@ if enabled ebp_available; then
>>    echo "#define CONFIG_EBP 1" >> $TMPH
>>  fi
>>  
>> +if enabled ebx_available; then
>> +  echo "#define CONFIG_EBX 1" >> $TMPH
>> +fi
> 
> Add ebx_available to CONFIG_LIST instead.
Done.

Updated patch attached.

 configure |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)




-- 
With friendly regards,
Takis

vCard: http://www.issaris.org/pi.vcf
Public key: http://www.issaris.org/pi.key
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